My study has 4 treatment groups. I expect that approximately 200 respondents will participate in each version. The difference between the versions is a informative sentence which is likely to effect the choice of the respondents in the choice experiment.
How many questionnaire versions should I choose for each survey? Logically, I would say 1 version because then we observe the effect of the treatment.
On the other hand, I know that it is recommended to include at least 100 questionnaire versions to prevent order bias. Would it be theoretically acceptable to create 200 versions for each treatment? Would Lighthouse Studio create the same 200 versions for each survey? Or would they be different from each other?
Many thanks for your support!